Dental engine



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C. H. SBBGER.

d DENTAL ENGINE. No. 421,323'.

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(No Model.) 2 Sheets-Sheet 2. O. H. SEEGER.

DENTAL ENGINE.

No. 421,323. Patented Feb. 11,18901.

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-. CARL H. SEEGER, OF MANITOVOC, VISGONSIN.

DENTAL ENGINE.

SPECIFICATION forming part of Letters Patent No. 421,323, dated February 11, 1890.

Application filed July l, 1889. Serial No. 316,233. (No model.)

To @ZZ whom it may concern:

Be it known that I, CARL H. Snnenn, of Manitowoc, in the county of Manitowoc, and in the State of lViseonsin, have invented certain new and useful Improvements in Dental Engines; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to dental engines; and it consists incertain peculiarities of construction and combination of parts, to be hereinafter described with reference to the accompanying drawings, and subsequently claimed.

In the drawings, Figure l represents a side elevation of a dental engine embodying my improvements; Figs. 2 and 8, detail sectional views illustrating the operation of a springplunger that constitutes part of my invention; Fig. et, a detail front elevation of the drivegear; Fig. 5, a detail vertical longitudinal section of a portion of my invention; Fig. 6, a detail sectional view of the upper portion of the engine; Fig. 7, a detail horizontal section illustrating the belt-shifter, belt-guide, and clutch for stopping the travel of the belt; Fig. 8, a detail sectional view on line S S, Fig. 6; Fig. 9, a side elevation, partly in section, of a eounterbalanced holder for the flexible shaft employed in.. the class of devices to which my invention relates; and Fig. l0, a detail sectional view on line l0 10, Fig. 9.

Referring by letter to the drawings, A represents aiioor, to which is attached two standards B, the latter being provided with bearings for shafts C D. The shaft C is driven by anyV suitable motor, and carries a tight pulley b and loose pulley c for belt-connection E, wit-l1 similar pulleys d c on the shaft D, a double-grooved tight pulley F being also carried by the latter shaft, as is best illustrated in Fig. 4.

Rigidly secured to a wall or other suitable support at a certain elevation above the standards I3 is a bracket G, provided with eyes f for a vertical rod II, the latter being retained in said bearings by means of setscrews g, to form a bearing for the arms I I of a swinging bracket. Keyed to the vertical arm II of the swinging bracket by means of a screw g or other suitable means is afranie J, provided with bearings for a shaft K, the latter being provided with a centrally-Han ged tight pulley L and two loose pulleys M M", these latter pulleys being arranged on opposite sides of the tight pulley and provided at their outer ends with flanges, as is best illustrated in Fig. 5. The frame J vis also provided with bearings for a spring-controlled sliding rod N, the latter having lateral projeetions t' t" arranged in pairs on opposite sides of said rod. The outer end of the sliding rod engages a slot j in the adjacent end of a lever O, pivoted to the frame J, and a cord, wire, or other flexible connection j unites the other end of'said lever with a spring-controlled plunger P, arranged to operate ina casing P', attached to the door A, `said. flexible connection being guided by a series of suitably-arranged pulleys 7o, as shown in Figs. 1 and 2. A straight belt Q and crossed belt Q are arranged in the grooves of pulley F to pass between the flanges on the opposing tight and loose pulleys M L M on the shaft K, as well as between the projections 1l t" on the sliding rod N.

Then the lever O is in its normal position, the straight belt Q, will be on the tight pulley L and the crossed belt Q on the loose pulley M but when the spring-controlled plunger P is forced down in its easing P said lever will be operated to slide the rod N and thereby shift the straight belt onto the loose pulley IWI and the crossed belt onto the tight pulley, said plunger being retained in its depressed position by means of a spring-latch R, pivotally connected to the casing, as illustrated in Fig. 3.

By means of the construction just described the rotation of the shaft K may be readily reversed, the spring-plunger being preferably arranged beneath a dental chair, so as to be within easy reach of the operatorls feet.

Fast on the shaft K is a pulley S for a belt T, that runs between guide-rollers m, journaled in a frame U, screw-threaded to the upper end of the vertical rod II, and also over pulleys n o, that have their bearings in a bracket p on a telescopic extension p of the horizontal arm I of the swinging bracket above described; and said belt is finally run on a pulley q, fast to a shaft r, that has its bearings in a counterbalanced holder WV, the latter shaft having a fiexible connection s with a dental tool X, as is best illustrated in Fig. 1.

Supported on the arm I of the swinging bracket is a vertical frame Y, provided with a guide t for the belt T, and pivoted to said frame is a spring-controlled lever a, provided with a clutch-block u', said lever being counected bya cord fu with another cord w, that travels over a series of suitably-arranged pulleys to connect an arm y on the counterbalanced holder W with a spring-controlled plunger Z, that operates in a casing Z', adjacent to the plunger P, above described.

By depressing the plunger Z the counterbalanced holder is elevated to slacken the belt T, and at the same time the leveruis operated to cause a grip of the clutch-block a on said belt, whereby the latter is instantly checked and the operation of the dental tool stopped.

The plungers P Z and their respective casings are precisely alike, and both are held in their depressed position by a spring-latch such as shown in Fig. 3.

To prevent the belt T from slipping off the the pulley q,I attach a guard q to the holder "W, this construction being best illustrated in Fig. 10.

In order to prevent the fiexible connection s from breaking off at the point where it bends to depend in a vertical direction, I' employ a tube W, having a flaring and curved outer end, the inner end of said tube being slipped onto the sleeve IW, that forms part of said holder.

The fiexible connection S follows the curve of the tube W', and the flaring outer end of said tube permits said flexible connection to move up and down as the dent-al tool is manipulated by the operator.

In case the dental engine is run by other than foot-power, I would connect the source of power with a spring-controlled plunger similar to those above described, and arrange such plunger adjacent to the ones shown, so that said power may be regulated by the operators foot.

The spring-plunger above described forms the subject of a separate application for patent filed November 25, 1889, Serial No. 331,581. Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, ism

1. In a dental engine, t-he combination of a swinging bracket, a holder provided with bearings, a shaft arranged in the bearings, a

a belt-and-pulley gear for operating the toolshaft, substantially as set forth.

2. In a dental engine, the combination of a swinging bracket, a counterbalanced holder provided with bearings, a shaft arranged in the bearings, a dental tool iiexibly connected to the shaft, a suitably-arranged spring-controlled plunger, a cord or analogous means extended along the bracket to unite said holder and plunger, and a belt-and-pulley gear for operating the tool-shaft, substantially as set forth.

3. In a dental engine, the combination of a swinging bracket, a holder suspended fromr the bracket and provided with bearings, a shaft arranged in the bearings, a dental tool flexibly connected to the shaft, a pulley on the shaft, a counter-shaft carried by said bracket and provided with a power-transmitting pulley, a belt arranged on said pulleys, a tight-pulley and two loose pulleys arranged on the counter-shaft, a suitably arranged and driven double pulley, a straight belt normally connecting the double pulley and said tight pulley on the counter-shaft, a crossed belt normally arranged to connect said double pulley and one of the loose pulleys on said counter-shaft, a spring-controlled slid` ing rod carried by the swinging bracket and provided with projections arranged to straddle said belts, a lever connected to the rod, a spring controlled plunger, and a cord or analogous means connecting the lever and plunger, substantially as set forth.

4. In a dental engine, the combination of a swinging bracket, a holder provided with bearings, a shaft arranged in the bearings, a dent-al tool fiexibly connected to the shaft, a pulley carried on the shaft, a counter-shaft carried by said bracket and provided with a power-transmitting pulley, a belt arranged on said pulleys, a suitably-arranged spring-controlled plunger, a cord or analogous means extended along the swinging bracket to unite the holder and plunger, a spring-controlled clutch-lever pivoted to said frame in opposition to the latter and said belt, a cord or analogous means uniting the lever with the cord that connects said holder and plunger, and a belt-and-pulley gear for actuating said counter-shaft, substantially as set forth.

5. In a dental engine, the combination of a shaft, a system of belts and pulleys arranged to actuate the shaft in either direction, a shifter for the belts, and a spring-controlled plunger flexibly connected to the shifter, substantially as set forth.

6. In a dental engine, the combination of a swinging bracket, a holder suspended from the bracket and provided with bearings, a shaft arranged in the bearings, a dental tool fiexibly connected to the shaft, a pulley on said shaft, a countershaft carried by saidbracket and provided with a power-transmitting pulley, a belt arranged on said pulleys,

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a clutch for the belt, and t spring-controlled In testimony that I @latini the foregoing I lo plunger flexibly connected to said holderand have hereunto set my hand, at Manitowoc, in belt-Clutch, substantially as set forth. the county of Manitowoc and State of ViS- 7. In a dental engine, the combination of e eonsin,in the presence of two Witnesses. holder provided With bearings, t shaft ari ranged in the bearings, a dent-(tl tool flexibly CARL H' SEEGER' connected to the shaft, and zt tubular support I/Vitnesses: for the flexible connection having :L curved Jos. P. STAEHLE,

and laring end, substantially as set forth. K. PIENING. 

